PeerSpot users discussed what the most important features of a cloud email service were, and the consensus pointed to usability. This includes the service's reliability/availability, support, and migration/integration abilities as well as its compatibility with other applications. On top of the basic user friendliness of the cloud email, members want to see clean a web interface and solid security features in place, along with easy customization that contributes to a strong market perception...
It's very cheap. The cheapest among all the services available.
The solution should improve its price. I rate pricing a six out of ten.